<template>
  <div class="list" ref="wrapper">
     <div>
       <div class="area">
          <!-- border-topbottom 1像素边框-->
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
            <div class="button-wrapper">
              <div class="button">{{this.currentCity}}</div>
            </div>
          </div>
       </div>
       <div class="area">
          <!-- border-topbottom 1像素边框-->
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div class="button-wrapper" v-for="item of hot" :key="item.id" @click="handleCityClick(item.name)">
              <div class="button">{{item.name}}</div>
            </div>
          </div>
       </div>
       <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list" v-for="innerItem of item" :key="innerItem.id">
            <div class="item border-bottom"  @click="handleCityClick(innerItem.name)">{{innerItem.name}}</div>
           <!-- 最好加个判断，最后不加 border-bottom <div class="item ">阿拉尔</div> -->
          </div>
       </div>
     </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
import { mapState, mapMutations } from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  mounted () {
    const options = {
      // 处理在better-scroll在安卓手机上不能点击的问题
      // 更多配置见
      // https://ustbhuangyi.github.io/better-scroll/doc/zh-hans/options.html#click
      click: true,
      tap: true
    }
    this.scroll = new Bscroll(this.$refs.wrapper, options)
  },
  methods: {
    handleCityClick (city) {
      // this.$store.dispatch('changeCity', city)
      // this.$store.commit('toChangeCity', city)
      this.toChangeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['toChangeCity'])
  },
  watch: {
    letter () {
      if (this.letter) {
        const element = this.$refs[this.letter][0]
        // console.log(element) //这是个数组
        this.scroll.scrollToElement(element)
      }
    }
  }
}
</script>
<!-- list -->
<!-- left: 0
    right: 0 -->
<!--   要么
     width: 100%;
    max-width: 650px -->
<style lang="stylus" scoped>
  @import '~@/assets/styles/varibles.styl'
  .border-topbottom
    &:before
      border-color: #ccc
    &:after
      border-color: #ccc
  .border-bottom
    &:before
      border-color: #ccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    bottom: 0
    width: 100%;
    max-width: 650px
    .title
      line-height: 0.44rem
      background: #eee
      padding-left: .2rem
      color: #666
      font-size: .22rem
      text-align: left
    .button-list
      overflow: hidden
      padding: .1rem 0.6rem .1rem .1rem
      .button-wrapper
        float: left
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: 0.02rem solid #ccc
          border-radius: .06rem
          font-size: .26rem
    .item-list
      .item
        line-height: 0.72rem
        padding-left: 0.2rem
        text-align: left

</style>
